#include <bits/stdc++.h>
using namespace std;
int r, b; string s;
int main() {
	for(int i = 0; i < 3; i++) {
		cin >> s;
		if(s == "RED") r++;
		else b++;
	}
	cout << (r > b ? "RED" : "BLUE") << endl;
	return 0;
}